Packing and process of making same



Patented June 5; 1934 1,961,675 PACKING AND PROCESS OF MAKING' SAME PaulF. Schade, Berlin, Germany, assignor to Ghemieprodukte G. m. b. 11.,Berlin, Germany No Drawing. Application June '1, 1930, Serial No. 7

459,834. In Germany February 6, 1930 12 Claims. (Cl. 91-68) Thisinvention relates to novel wrappers or packings for protecting metalbodies, such as gas or water-pipes, electric cables or the like againstcorrosion and similar destruction, and more particularly wrappers orpackings of the kind described in my copending two applications forpatent Serial No. 232,713, filed November 11th, 1927 and Serial No.338,052, filed February 6th, 1929.

According to the aforementioned applications for patent I provideaplastical protective wrapper or packing for underground pipes or cables,said wrapper or packing consisting essentially of a core of texture orpaper impregnated with a special, permanently plastical mass.

The process forming part of my present invention consists in providingwrappers or packings of the kind forming the subject matter of myaforementioned two applications for patent having the aforementionedcore in the form of a rope or ropes or cords which may consist of anydesired material, such as for instance hemp or jute, that is ordinaryropes or cords 'obtainable on the market.

' The plastical mass applied to a core having the form of a rope orropes or cords may, for instance, be' made according to my inventionfrom residues gained from a processof distillation of mineral oils,such, as protoparafiine, soft bitumen and eventually indifferentsubstances which are non-conductors of the electric current, such asporcelain earth, said residues being treated under exclusion of anymoisture.

The plastical mass now is applied according to my invention to the corewhich is of the form of a rope or ropes or cords, for instance, in sucha way that said plastical mass is transformed by heat into a relativelyliquid mass and by passing the rope or cord through a bath of such aliquid mass with the effect that the rope or cord will be thoroughlysoaked and impregnated with said mass. Any excess of the plastical mass,that is, that part of the mass which is not absorbed by the core mayeventually be skimmed off the surface of the latter by the aid of properauxiliaries, thus securing, in addition to the impregnation, a uniformdistribution of the-plastical mass over the entire surface of the core.The process of soaking or impregnating said core with the plastical massand the process of skimming of! the excess of mass from the surface ofthe core may repeatedly be applied, if this should be found desirable.

A core soaked or impregnated with the plastical mass may be employedpreferably for purposes of insulating electric cables or for makingpackings or wrappers for underground pipes. Especially in those caseswhere heretofore tarred. hemp ropes or ordinary white ropes had beenused the wrapper or packing made according to my present invention maybe more successfully employed. Cables, pipes or the like maythus beperfectly tightened at the point of introduction into the cellars orbasements of houses permitting the proper cable or pipe connection to bemade. Cables as known are introduced into the houses with the aid of arelatively short piece of pipe which is inserted into the wall of thebasement. This mode of introducing cables, however, is connected withgrave disadvantages which consist essentially in the danger of leakagewhich may take place at the points where said cables are tightenedagainst said pipes or the like, this leakage resulting 'into escape ofgas or water in case .of rupture of a pipe. This escaping gas or watermay now enter the cellar of the house through said piece of pipe andgive rise to explosion, gas poisoning or similar troubles. Leakages ofthis kind and the consequent escape of gas or water, as well known, havefrequently resulted in destructions of the street and destructions ofother kind of which recently quite a large number has become known inseveral countries.

Leakages of the aforementioned kind and the consequent escape of gas orwater from the pipe system now may be positively prevented by providinga proper and absolutely effective packing at the point of introductionof the cable or pipe and between the cable or pipe on one hand and thewalls of houses on the other hand. All attempts heretofore made toprovide a proper packing for cables or pipes at the points ofintroduction into houses have been rather unsuccessful on account of thefact that the ordinarily used tightening substances, such as cement,clay, tarred ropes, masses that are applied by a casting process,redlead, lacquer, varnish or the like also in connection with a carrieror core in the form of'a rope or cord have the inherent disadvantage ofbecoming hard and brittle after some time and are therefore liable tobreak or crack due to vibrations such as are produced to an everincreasing extent by the modern automobile trailic.

These disadvantages which are inherent to cable or pipe packings of theordinary kind are fully and most successfully avoided by my presentinvention according to which a rope, ropes or cords are provided as acore for a permanently plastical packing or tightening material.According to my invention, the cables, pipes or the like, moreparticularly, are provided with a wrapper or packing which consists of arope, ropes or cords, soaked or impregnated with permanently plasticalmaterial at or preferably somewhat in front of the points at which saidcables or pipes are introduced into the houses, and more especially,into the inlet pipes, potheads or the like Furthermore, ac-- cording tomy invention, thewrapper or packing having a core in the form of a ropeor cords with a permanently plastical mass is applied to the cable orpipe in such a manner thatit will completely fill up the spaceintermediate the cable or pipe on the one hand and the pothead or inletpipe on the other hand.

As material for the core of my present packing or wrapper I prefer touse especially thin ropes or cords of hemp, jute, silk or the like whichare impregnated or soaked in the above described manner with thepermanently plastical mass and thereupon twisted into a unitary rope,cob, lap or the like. A wrapper made in this manner now may be treatedmuch like putty or mastic permitting to provide a most effective packingwhich permanently retains its plasticity and in addition to this will beabsolutely impervious to gas as well as to liquids. By my inventiontherefore,

I have provided a novel, extremely valuable wrapper or packing for gasand water-pipes, electric cables or the like which fully complies withall modern requirements, especially as regards vibrations which as abovementioned are produced by modern traflic to an ever increasing extent onthestreets of-cities and even on country roads.

I claim; 1. A corrosion-proof, electrically insulating and continuallyplastic packing or tightening material, consisting of a cord or ropeimpregnated and covered with a mixture of soft bitumen and such achemically inert product of earth-oil distillation as containsproto-parafline.

' 2. A corrosion-proof, electrically insulating and dntinually plasticpacking or tightening material consisting of a cord or rope impregnatedand covered with a mixture of soft bitumen, an in-- different fillingsubstance, and such a chemically inert product of earth-oil distillationas contains ically inert product of earth-oil distillation as containsprotoparafline.

5. A corrosion-proof, electrically insulating and continually plasticpacking or tightening material, consisting of a plurality of cords orropes twisted together and impregnated individually with a mixture ofsoft bitumen, an indifierent filling substance, and such a chemicallyinert product ofearth-oil distillation as contains protoparaifine.

6. A corrosion-proof, electrically insulating and continually plasticpacking or tightening material, consisting of a plurality of cords orropes twisted together and impregnated individually with a mixture ofsoft bitumen, petroleum jelly and such a chemically inert product ofearth-oil distillation as contains protoparailine.

7. The method of manufacturing a corrosionproof electrically insulatingand continually plastic packing and tightening material, consisting inimpregnating and covering a cord or rope with a mixture composed of from20 to 40 parts of soft bitumen and such an amount of a chemically inertproduct of earth-oil distillation 'containing protoparafilne that thislatter substance amounts to from 30 to 50 parts.

8. The method of manufacturing a corrosionproof, electrically insulatingand continually plastic packing and "tightening material, consisting inimpregnating and covering a cord or rope with a mixture composed of from20 to 40 parts of soft bitumen having a fusing point up to 40 C., andsuch an amount of a chemically inert product of earth-oil distillationcontaining protoparafline having a fusing point of 53 C. that thislatter substance amounts to from 30 to 50 parts. I

9. The method of manufacturing a corrosionproof, electrically insulatingand continually plastic packing and tightening material, consisting inimpregnating and covering a cord or rope with a mixture composed of from20 to 40 parts of soft bitumen, up to 5 parts of'petroleum jelly, andsuch an amount of a chemically inert, product of earth-oil distillationcontaining protoparafline that this latter substance amounts to from 30to 50 parts.

10. The method of manufacturing a corrosionproof, electricallyinsulating and continually plastic packing and tightening material,consisting in impregnating and covering a cord or rope with a mixturecomposed of from 20 to 40 parts of soft bitumen having a fusing point upto 40 0., up to 5 parts of petroleum jelly having a fusing point up to30 C., and such an amount of a chemically inert product of earth-oildistillation containing protoparafline having a fusing point of 53 .C.that this latter substance amounts to from 30 to 50 parts.

11. The method of manufacturing a corrosionproof, electricallyinsulating and continually plastic packing and tightening material,consisting in impregnating and covering a cord or rope with a mixturecomposed of from 20 to 40 parts of soft bitumen, such an amount of achemically inert product of earth-oil distillation containingprotoparaifine that this latter substance amounts to from 30 to 50 partsand from 4.) to 60 parts of a finely pulverized mineral substance.

12. The method of manufacturing a corrosionproof, electricallyinsulating and continually plastic packing and tightening material,consisting in impregnating and covering a cord or rope with a mixturecomposed of 15 parts of soft bitumen, 40 parts of protoparafiine, 5parts of earth-oil jelly, 30 parts of kaolin, andlO parts of kieselgur.

PAUL F. SCHADE.

